ELVA-1 has reported a rise in demand for solid-state noise sources capable of supporting measurement and calibration at millimeter-wave and sub-terahertz frequencies, pointing to the rapid expansion of high-frequency research across both academic and industrial sectors.
According to the company, accelerating development in fields such as 6G wireless communications, high-resolution imaging, spectroscopy, radio astronomy, and advanced detector technologies is driving the need for stable, well-characterized noise references operating well beyond 100 GHz. Engineers working at these frequencies are placing increasing importance on predictable and repeatable noise performance to ensure reliable experimental results.
ELVA-1 noted that noise sources in university and research laboratories are now being used for a broader range of applications than traditional receiver noise-figure measurements. Beyond classical Y- factor testing, they are increasingly employed for front-end validation, benchmarking emerging device technologies, and maintaining long-term repeatability in experimental setups operating between 140 GHz and 330 GHz.
The company observed that in the WR-05 (140–220 GHz) and WR-03 (220–330 GHz) waveguide bands, a key limitation in many measurement setups is the available noise power at the receiver input after accounting for real-world losses. Compact sub-terahertz front ends often include multiple waveguide components, transitions, and interconnects, each introducing insertion loss. Additional elements such as filters, adapters, and extended waveguide runs can further reduce the effective excess noise ratio (ENR) at the measurement plane by several decibels.
At the same time, receiver noise figures at sub-terahertz frequencies remain significantly higher than those seen at lower microwave bands. ELVA-1 explained that this elevated noise floor increases sensitivity to drift and uncertainty, particularly when the injected noise does not provide sufficient contrast. When effective ENR is too low, Y-factor measurements lose margin, repeatability suffers, and results can become dominated by setup-dependent effects rather than the true performance of the device under test.
As a result, high-ENR solid-state noise sources are increasingly viewed as a necessity rather than an option for WR-05 and WR-03 measurements. ELVA-1 said that sufficient ENR headroom allows engineers to tolerate unavoidable path losses while maintaining stable calibration conditions, an important factor when comparing results across different setups, laboratories, or development stages.
To address these requirements, ELVA-1 has expanded its ISSN family of solid-state noise sources for mmWave and sub-THz research applications. The ISSN-05 and ISSN-03 models cover the WR-05 and WR-03 waveguide bands, spanning 140–220 GHz and 220–330 GHz, respectively. The company stated that the devices provide full-band waveguide coverage with high ENR levels of up to approximately 35–40 dB, along with stable spectral noise density across the operating band.
ELVA-1 said these characteristics are designed to support receiver characterization and front-end calibration in practical laboratory environments where losses from waveguide components and interconnects are unavoidable. Interest has been particularly strong among academic and research users working with compact sub-terahertz front ends, where maintaining sufficient ENR at the receiver input is critical for stable and repeatable measurements.
In addition to its WR-05 and WR-03 products, the company also supplies precision-calibrated solid- state noise sources covering frequencies from 26.5 GHz to 170 GHz. ELVA-1 positions these offerings as part of a broader portfolio aimed at enabling consistent measurement workflows as research and development efforts move toward ever higher frequencies.
The company views the growing adoption of solid-state noise sources as part of a wider shift in high- frequency measurement practice. As research pushes deeper into the sub-terahertz regime and performance margins continue to tighten, ELVA-1 expects dependable high-ENR noise references to play an increasingly central role in delivering credible, repeatable, and comparable results in advanced mmWave and sub-THz systems.
Click here to learn more about noise sources from ELVA-1.
